JPH056362B2 - - Google Patents
Info
- Publication number
- JPH056362B2 JPH056362B2 JP57201050A JP20105082A JPH056362B2 JP H056362 B2 JPH056362 B2 JP H056362B2 JP 57201050 A JP57201050 A JP 57201050A JP 20105082 A JP20105082 A JP 20105082A JP H056362 B2 JPH056362 B2 JP H056362B2
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- crystal
- circuit
- oscillation circuit
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L3/00—Starting of generators
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/30—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator
- H03B5/32—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator
- H03B5/36—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device
- H03B5/364—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element being electromechanical resonator being a piezoelectric resonator active element in amplifier being semiconductor device the amplifier comprising field effect transistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
- H03B2200/006—Functional aspects of oscillators
- H03B2200/0082—Lowering the supply voltage and saving power
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は安定な発振を短時間で実現することが
できるMOS集積回路を用いた水晶発振回路に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a crystal oscillation circuit using a MOS integrated circuit that can realize stable oscillation in a short time.
（従来例の構成とその問題点）
従来の水晶発振回路は第１図に示すように、Ｐ
チヤネルMOSトランジスタ１とＮチヤネルMOS
トランジスタ２とよりなるインバータの入力端子
３と出力端子４との間に水晶振動子５、発振容量
６及び７を結合して所定の発振出力を得るが、水
晶振動子５の発振立上りが遅く、ウオツチ、クロ
ツク等の水晶発振回路で最も普及している32768
Hzの水晶振動子を用いた水晶発振回路では、安定
な発振状態に達するまでに４秒乃至５秒を要し、
例えば時計用LSIの検査工程に用いた場合、検査
に要する時間が長くなるという問題があつた。な
お図中、８は発振帰還抵抗、９は電源である。(Conventional configuration and its problems) As shown in Figure 1, the conventional crystal oscillation circuit
Channel MOS transistor 1 and N channel MOS
A crystal resonator 5 and oscillation capacitors 6 and 7 are coupled between an input terminal 3 and an output terminal 4 of an inverter made up of a transistor 2 to obtain a predetermined oscillation output, but the oscillation rise of the crystal resonator 5 is slow; 32768 is the most popular crystal oscillation circuit for watches, clocks, etc.
In a crystal oscillation circuit using a Hz crystal resonator, it takes 4 to 5 seconds to reach a stable oscillation state.
For example, when used in the inspection process of LSI for watches, there was a problem that the inspection took a long time. In the figure, 8 is an oscillation feedback resistor, and 9 is a power supply.
（発明の目的）
本発明は上記の難点を解決し、水晶振動子の安
定発振に達する立上り時間を短縮することを目的
とするものである。(Objective of the Invention) An object of the present invention is to solve the above-mentioned difficulties and to shorten the rise time required to reach stable oscillation of a crystal resonator.
（発明の構成）
本発明は、２組の水晶発振回路を具備し、一方
の水晶発振回路で発振状態にした水晶振動子を、
スイツチ、リレー等を介して他方の水晶発振回路
に切換え接続する構成の水晶発振回路であり、こ
れにより、他方の水晶発振回路の立上り時間を大
幅に短縮しようとするものである。(Structure of the Invention) The present invention comprises two sets of crystal oscillation circuits, and a crystal resonator that is brought into an oscillation state by one of the crystal oscillation circuits.
This is a crystal oscillation circuit configured to be switched and connected to the other crystal oscillation circuit via a switch, relay, etc., and is intended to significantly shorten the rise time of the other crystal oscillation circuit.
（実施例の説明）
第２図は本発明による水晶発振回路の一実施例
の構成を示す回路構成図で、１及び１′はＰチヤ
ネルMOSトランジスタ、２及び２′はＮチヤネル
MOSトランジスタで１と２及び１′と２′はそれ
ぞれインバータを構成し、３及び３′は入力端子、
４及び４′は出力端子、８及び８′は発振帰還抵抗
であり、それぞれ第１及び第２の発振回路ａ及び
ｂを構成し、ｃは水晶振動子５と発振容量６及び
７と発振回路切換えリレー１０を有する回路であ
る。(Description of Embodiment) FIG. 2 is a circuit diagram showing the configuration of an embodiment of the crystal oscillation circuit according to the present invention, in which 1 and 1' are P-channel MOS transistors, 2 and 2' are N-channel MOS transistors, and 2 and 2' are N-channel MOS transistors.
MOS transistors 1 and 2 and 1' and 2' constitute an inverter, respectively, 3 and 3' are input terminals,
4 and 4' are output terminals, 8 and 8' are oscillation feedback resistors, and constitute the first and second oscillation circuits a and b, respectively, and c is the crystal resonator 5, oscillation capacitors 6 and 7, and the oscillation circuit. This circuit includes a switching relay 10.
まず、発振回路切換えリレー１０を第１の発振
回路ａ側に切換え接続しておき、第１の水晶発振
回路を形成して水晶振動子５を安定状態にしてお
く。このとき第２の発振回路ｂには電源電圧を供
給しておく。 First, the oscillation circuit switching relay 10 is switched and connected to the first oscillation circuit a side to form a first crystal oscillation circuit and keep the crystal resonator 5 in a stable state. At this time, the power supply voltage is supplied to the second oscillation circuit b.
次にリレー１０により第１の発振回路ａにより
水晶振動子５が発振状態を維持している間に回路
ｃを第２の発振回路ｂ側に切換えると、第２の水
晶発振回路を形成し、発振回路ｂによる水晶振動
子５の安定発振に到達する立上り時間が著しく短
縮できることになる。すなわち、Ｂ水晶振動子５
を発振回路ａにより予め発振状態にしてあること
及びリレー１０の切換え時のトリガーも加わつて
安定な発振が短時間に得られ出力端子４′より出
力される。 Next, when the circuit c is switched to the second oscillation circuit b side by the relay 10 while the crystal resonator 5 is maintained in an oscillation state by the first oscillation circuit a, a second crystal oscillation circuit is formed. The rise time required for the oscillation circuit b to reach stable oscillation of the crystal resonator 5 can be significantly shortened. That is, B crystal oscillator 5
is set in an oscillating state in advance by the oscillation circuit a, and with the addition of a trigger when switching the relay 10, stable oscillation is obtained in a short time and is output from the output terminal 4'.
このように、32768Hzの水晶振動子を用いた従
来のMOS型発振回路では安定な発振出力を得る
のに４秒〜５秒かかつていたものが、本発明の回
路構成を用いると予備発振を必要とするが、所望
の安定発振出力を短時間に効率よく得ることがで
きる。しかもリレー１０の切換えに要する時間
0.005秒〜0.01秒とリレー切換え期間に起る水晶
振動子出力振幅低下による安定発振出力回復時間
0.05秒〜0.1秒であり、リレー１０を切換えてか
ら合計0.55秒〜0.11秒で安定な発振出力が出力端
子４′より得られる。 In this way, with the conventional MOS oscillation circuit using a 32768Hz crystal resonator, it took 4 to 5 seconds to obtain a stable oscillation output, but with the circuit configuration of the present invention, preliminary oscillation is required. However, the desired stable oscillation output can be efficiently obtained in a short time. Moreover, the time required to switch relay 10
Stable oscillation output recovery time from 0.005 seconds to 0.01 seconds due to crystal oscillator output amplitude drop that occurs during relay switching period
This is 0.05 seconds to 0.1 seconds, and a stable oscillation output is obtained from the output terminal 4' in a total of 0.55 seconds to 0.11 seconds after switching the relay 10.
第３図は本発明の他の実施例の回路構成図で、
第２図における発振容量６及び７が水晶振動子５
と隣接して回路ｃ内に設けられていたものを発振
回路ａ及びｂにそれぞれ６，７及び６′，７′とし
て設け同様な効果を得るようにしたものである。 FIG. 3 is a circuit diagram of another embodiment of the present invention,
The oscillation capacitors 6 and 7 in FIG. 2 are the crystal oscillator 5.
The oscillation circuits 6, 7 and 6', 7' which were provided adjacent to the circuit c in the oscillation circuits a and b are provided to obtain the same effect.
（発明の効果）
以上説明したように、本発明は、発振立上りを
急峻にする必要があるあらゆる水晶発振回路に利
用することができ、また、水晶発振回路を含む
MOS集積回路の検査にこの回路構成を用いれば、
検査時間の短縮が可能で量産性の向上等の工業的
価値は極めて大となるという効果がある。(Effects of the Invention) As explained above, the present invention can be used in any crystal oscillation circuit that requires a steep rise in oscillation, and can be used in any crystal oscillation circuit including a crystal oscillation circuit.
If this circuit configuration is used to test MOS integrated circuits,
This has the effect that the inspection time can be shortened and the industrial value such as improved mass productivity is extremely large.
第１図は従来の水晶発振回路の回路構成図、第
２図は本発明による水晶発振回路の一実施例の回
路構成図、第３図は本発明の他の実施例の回路構
成図である。
１，１′……ＰチヤネルMOSトランジスタ、
２，２′…ＮチヤネルMOSトランジスタ、３，
３′………入力端子、４，４′……出力端子、５…
…水晶振動子、６，７……発振容量、８，８′…
…発振帰還抵抗、９……電源。
FIG. 1 is a circuit diagram of a conventional crystal oscillation circuit, FIG. 2 is a circuit diagram of an embodiment of the crystal oscillation circuit according to the present invention, and FIG. 3 is a circuit diagram of another embodiment of the present invention. . 1,1'...P channel MOS transistor,
2, 2'...N channel MOS transistor, 3,
3'...Input terminal, 4,4'...Output terminal, 5...
...Crystal resonator, 6,7...Oscillation capacitor, 8,8'...
...Oscillation feedback resistor, 9...Power supply.
Claims (1)
回路を有し、一方の水晶発振回路で振動状態にあ
る水晶振動子を、他方の水晶発振回路に切換え接
続して動作するようにしたことを特徴とする水晶
発振回路。 ２ ２組の水晶発振回路はそれぞれ発振容量を有
することを特徴とする特許請求の範囲第１項記載
の水晶発振回路。[Scope of Claims] 1. Two sets of crystal oscillation circuits that share one crystal oscillator, and the crystal oscillator in a vibrating state in one crystal oscillation circuit is switched and connected to the other crystal oscillation circuit. A crystal oscillation circuit characterized by being made to operate. 2. The crystal oscillation circuit according to claim 1, wherein each of the two sets of crystal oscillation circuits has an oscillation capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57201050A JPS5991709A (en) | 1982-11-18 | 1982-11-18 | crystal oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57201050A JPS5991709A (en) | 1982-11-18 | 1982-11-18 | crystal oscillation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5991709A JPS5991709A (en) | 1984-05-26 |
| JPH056362B2 true JPH056362B2 (en) | 1993-01-26 |
Family
ID=16434563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57201050A Granted JPS5991709A (en) | 1982-11-18 | 1982-11-18 | crystal oscillation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5991709A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010171810A (en) | 2009-01-23 | 2010-08-05 | Rohm Co Ltd | Oscillation circuit |
| US9112448B2 (en) | 2013-10-28 | 2015-08-18 | Qualcomm Incorporated | Ultra low-power high frequency crystal oscillator for real time clock applications |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51123044A (en) * | 1975-04-21 | 1976-10-27 | Hitachi Ltd | Starting circuit in the oscillation circuit |
-
1982
- 1982-11-18 JP JP57201050A patent/JPS5991709A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5991709A (en) | 1984-05-26 |
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